The Justice Department said that data from Texas showed that almost 11 percent of Hispanic voters, or more than 300,000, did not have a driver’s license or state-issued identification card, and that plans to mitigate those concerns were incomplete.

“Hispanic registered voters are more than twice as likely as non-Hispanic registered voters to lack such identification,” Assistant Attorney General Thomas Perez, head of the department’s civil rights division, said in a letter outlining the objection to the Texas director of elections.